生物多样性

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南麂列岛海洋自然保护区浮游动物的物种组成及其多样性

纪焕红*, 叶属峰, 刘星, 洪君超   

  1. (国家海洋局东海环境监测中心, 上海 200137)
  • 收稿日期:2005-10-13 修回日期:2006-04-03 出版日期:2006-05-20
  • 通讯作者: 纪焕红

The species composition and diversity of zooplankton in Nanji Islands National Nature Reserve

Huanhong Ji*, Shufeng Ye, Xing Liu, Junchao Hong   

  1. East China Sea Environmental Monitoring Center, State Oceanic Administration, Shanghai 200137
  • Received:2005-10-13 Revised:2006-04-03 Online:2006-05-20
  • Contact: Huanhong Ji

南麂列岛海洋自然保护区是我国首批五个海洋类自然保护区之一。作者根据2004年5月至2005年2月南麂列岛海域的4个季节的调查数据, 分析了该区域浮游动物的种类组成、优势种类、生态类群与物种多样性等特征参数的季节变化。调查结果表明,共鉴定出浮游动物69种,隶属于6门12个类群,其中桡足类最多,占39.1%;可划分为5种生态类群,暖水性广布类群和暖温带近海类群为两种主要生态类群;出现优势种类15种,主要有中华哲水蚤(Calanus sinicus)、精致真刺水蚤(Euchaeta concinna)和肥胖箭虫(Sagitta enflata)等。多样性分析显示,除冬季外,其他三个季节Shannon-Wiener指数(H′)值均大于2,且秋季最高,达3.29。相关性分析表明,种类数与水温的正相关性非常显著。与1990年调查结果相比,春季和秋季种类类群及种类数有所减少,这与调查时水温变化有关。研究分析认为,种类组成的季节变化主要受到江浙沿岸流和台湾暖流的影响。

In order to elucidate the variation of species composition and diversity of zooplankton in Nanji Islands National Nature Reserve 14 years after establishment, we conducted investigations in four seasons from May 2004 to February 2005. A total of 69 species were identified, belonging to six phyla and 12 taxa. These species, with copepods accounting for 39.1%, could be classified into five ecotypes, of which the warm-water eurytopic group and warm-temperate offshore group were dominant. There were 15 dominant species, such as Calanus sinicus, Euchaeta concinna, and Sagitta enflata. Shannon-Wiener index (H′) was more than 2.0 in all seasons except winter, and it peaked in autumn (3.29). The species number presented no-table positive correlation with water temperature. Compared with data from 1990, the species number in spring and autumn had decreased, which may have resulted from the difference in water temperature. The seasonal change in zooplankton species composition was principally due to the fluctuation of Taiwan warm current and Jiangsu-Zhejiang coastal current in alternation.

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